Sewing-machine.



H. QWALL SEWING MACHIN. 111451101111011 FILED r11/11122, 1914.

Pwr/158858.-

Hammam comuni, or

PABKVIEW, HELENSBURGH, SCOTLAND, .LBSIGNOB T THE SINGER MANUFACTURING COMPANY, A CORPORATION' 0F )TEW JERSEY.

SEWING-MACKIE' E.

This invention relates to improvements inA multiple needle sewffng machines, and articularly to that class of machines in .w ich means are provided for throwing one of the needles temporarily out of action while the other or others continue to reciprocate. The improvements are adapted primarily for use in connection with two-needle sewing machines for Simultaneously forming .20 two independent seams or rows of stitches.

To permit'the formationi of an ular seams in a machine of this class, it is a( vantageous to temporarily disconnect one of the needlebars from its actuating mechanism without stoppingr the machine. iVith this objectin view t ie present improvements provide means whereby a reciprocatory driving element which embraces both of the 'needlebars and which is provided' with sprinffpressed locking members automatically movable into engagement witli'each of said .4 necdle-bars,is employed in connection with selective retractii members adapted to uti- ;Iize the motion o he driving element to retract the locking means from either or both of the needle-bars during the operation of the machine. The released -bar-is thrown upward ont of register witli'tlie looking means by means of a spring which surrounds Athe sume, said bar being returned to locking position-by manual ressure upon the same against the action o its spring( In the drawings Figure 1 is a. front ele- ,.tih of the held of n machinetrm wi the improvements applied thereto; and Fig.

2 is .a side elevation of the parte shown 1n `Fig. 1. Fig. 8 'is e horizontal section on the linee-4, Fig. 1.

Referring to the drawings, the two needle- 60 bars 1 are shown mounted to reciprocate within the head B of overhengin arm A,

both of said needle-bars being em. raced by a yoke 2, which, in turn, is operatively con` nected with a crank 3 on the up er oi'. main driving shaft of the machine. he yoke 2 Speciilcatlon of Letters Patent;

Application lcd )lay 22, 1914. Serial No. 840,170.

Patented Oct. 23, 1917.

is formed with two orifices 4 'within which move the sprmpressed locking pins 5, one en d of each pin ing adapted to enter socket 6 in the corresponding needle-bane flange 7 on cach pin serving to limit the movement thereof within the needle-bar socket under the action of spring 7". Each needle-bar is .provided with a longitudinal shallow groove 1* to receive the end of a screw-pin a, threaded in the lreke, which prevents accidental rota-tion of the needle-bar when the latter is uncoupled. A cap 8 secured 'to the face of the vokc by means of screw 9 Ais provided with prolecting bushings S* through which pass the locking pins, the o'nter ends of each pin being enlarged, or provided. as in the present instance,.with a beveled thumb-nut 10 und a. stop-nut 11 at the rear thereof. A

Intermediate tlie thumb-nut 10 and the Jcap S, and secured in fixed position upon the head B by means of screws 12, is a bracket-'plato 13 formed with longitudinal 'i apertures 14 within which and locking,r pins 5 reciprocate during the movement nf yoke 3. ltxtending laterally from the bracket-plate are upper and lower guide-arms 15 :md 16, each arm being a ertared to receive two sliding rods 17 eac of which carries at its lower end a forked wedge. 18 adapted to engage one of the locking` pins 5 to retract the same from tlie needle-ban Each wedge member is normally held upward, ont of Aeilective' position with respect tot-lie locking which it registers, by means of a 1i spring 19 which surrounds the sli e-.rod intermediate the lower guide-arm 16 and 'a stop-pin 20 fitted within u transverse aperture in said rod. To the upper end of each slide-rod 17 is moored, by screw 21, a lingerpece 22, by means of which the rod may be depressed .to carry its wedge member into effective position' with respect to the locking pin. It will be seenI that each wedge device is adapted to utilize the motion-of the driving yoke 2 to retract the lockingV means from the needle-bar, inasmuch asthe depression of. of finger-piece 22 will so position thewede 18 that u on the rise of yoke 2 the thum nut 10 wi l ride up forked wedge to retract 'the looking from the transverse socket of the need e-bar,

When either of the locking pins 5 iswithpin with the nut 10 on either slide-rod 17 by meens'- the inclined face of the' pin , zthrough the action of a surrounding' helical' @spring 23. The lowerend of leej'ch spningQB 'jres'ts upon '-.the upper fece of yoke member 2, y'fand its upperl end abats a bollar 24 .fixed 10,..as the locking in is within its Socket 6in -the needle-bar, ut immediately nfter'the rel itx-actionl ofsuid pin, the sp1-infr will lift the bar relatively. to the yoke, soft at the socket 1 '6 will be'm'znntlained outofregister with' the i 'pin until the bai' is de reseedl" f Fory dep'iessing-eae igneedle-har'to resl tablish the-goperative connection-'between the same and theyoke, there is fitted on the heud-B'of'tlie lnacket-urm=u tubular post 2G,- 20.=\\"lii'r:h is held in fixed position hy meansof :L screw :27 4:1nd a, stud 28. The post receives :i sli 1i1l;;pin` 25) fixed within i cap 30 um bracing' the upper endspfthe needle-hers. :ik sprlnglinterpsed between the lmse 'of the tubllegpogtindfthe 'lower'end of pin 20 tends-y to reise" thejeap 30,. theunovement-of the latter being .limitedliyalstoppin 31* 'fitted within 'u transve'roe aperture formed in thev tubularl poatj2f, 'erich-'engl' thereof en- Qteiing'e 'slot formed'inf-'thu cap; vWhen the 'cap is'deprc'esezedthe uuconpled needlerbar or bers will lie-:mired downwardly'sothat the liv the foregoing,r eonstuetiolrand nI-,

, .sjn'eli pui-noseV liking mounted oir the '.liend of ing Vtho operation of the mahihe, undmeans Vber out of register with upon tho needle bnr byfmeansof a.' clamping screw 25. The s pri'ngjis ineffective so long hors, positively nctuated means for rotraet' `ing said locking means and thereby disconembracing s'nd need e-lnn's with :und ulso relatively In the sinne, lindily the mwingif. nineh inh- :uid readily :ieeeriihle to4 prf-feine iinliodirnrnt thereof herein. shown;

- shaft and bars, retractible lookin members .carried by said eonneetiony one 'or each of the said bars, means Afor reti-actief; the locking member for either of the sul bars durn'cting automatically to' retain the released its lockingmember.

.2. In a multiple-needle sewing mpehiue, the combination with n frmne,of u, plurality of needle-bars mounted in said frame, n r eciprocatory driving element' adjacent sind needlelbars, locking means carried by said vdriving; element and 'automatically' fmovable into enguge'ment with each of -sa'id needlencting the driving element from either-0r all of-said bars during, the operation 'o'f'the machine, an`d w'tumutlcally 'noting means for throwing the released bur out of. register with its locking-means.

3. In a multiple-needle sewing machine,

Itho combination with e frame, of aphnal ity of needledmrs mounted in suid frame, u reciproentory. 'driving element adjacent midl needleb am locking means -cnried'ihy seid d rivi n g element .a nd nutoxnutieellyl mnvnble into'engngemet with each of j'sgnicl heedlehars, selective .retrncting xnemhersadapted 1.o utilizo the motion of the driving'element 95 4toretrect the locking Ineens from either of said needle-liars during the operation of themachine, and menns indonendent-of the retreating' members for reiiis'tnlilisihing'the opcrativo-`co|1nection rbetween each released needle-hex andthe driving 'element during n'a multiple-miedo sewing nnwhine, e freine, u plurality of nemlle-lmrs mounted :to reciprocate 'within said frame, n recipruczitorudriving eloquent und' inowihle .moying lneking'glnelnhers:V rurried 'by said drh-nig element for securing eneh needle 11o menus' for releasing` the'lueking lneniluus.

'witll -rospeelto either nmdledin r Il ll'ing'tho operation of the nnmhino..

.'5,' A sc-.wing nniehine equjppl-.d Iwith :l 115 ved or v :n-.h ndunted lio'lne moved into operntive-engngenn'nt wlllrlthe rirhrrgennull'. of

snid'liin ol' fhl'irrillmulillil lblil lo retract the |nn "I'nnn the ordine 4ilrthdfr ls-lmr. :nul

spi-ingewans udnptedwlretraetiorrAd'- the 13u pin or corresponding pin to raise the needlebar or corresponding needle-bar 'to an` extent greater than that of the normal upward movement imparted to it by the yoke.A

6. In a multiple-needle sewing machine, in combination, a needle-bar actuating mechanism, a. plurality of needle-bars capable of being separately yoperatively connected to and disconnected from said actuating mechanism, and a device stationary during the running of the machine and common to all said needle-bars, said device adapted on actuation to restablish operative connection with the actuating mechanism of `all the disconnected needle-bars simultaneously.

7 In a sewing machine, the combination lwith a reciprocatory needle-bar and a yoke 'embracing the same adapted to impart movement thereto from the main-shaft, of a spring-pressed locking pin mounted within saidyoke to engage a socket in the needlebar, means for retractingsaid locking pin from the needle-bar during the operation of the machine, means for lifting the released needle-bar to an extent greater than that of the normal upward movement imparted to it by the yoke, and a vertically movable member arranged adjacent t0 the upper end of the needle-bar, said member being min'nnilly maintained by a spring in raised position out of engagement with said noodle-bar, and being adapted on dpression to force the released needle-bar downwardly so as to bring the socket of said bar into register with the locking pin.

8. In a sewing machine having a plurality of bars carrying needles, a driving shaft, a reciprocatory driving element between said shaft and said bars, said reciprocatory driving element being dctachably connected with a plurality ,of bars, means for cfecting disengagement of the detachable bars from said reciprocatory driving element, and in- Y dei'iendcnt means for moving the detachable bars to a non-cngageable position relative to said rceiprocatory driving element.

9. 1n a sewing machine having a plurality of bars carrying needles, a driving shaft, a reciprocatory driving element between said shaft and said bars, said recproeatory driving element being detachably connected with a plurality of bars, means for eilecting disengagement of the detachable bars fromelement,'automatic means for moving each.`

bar to an elevated position, and manual means for restoring the bars to engageable relationship with sald reelprocatory drlvving element.

11. In a sewing machine having' a plurality of bars carrying needles, a driving shaft, a reciprocatory driving element between said .shaft and said bars, endwise movable pins for selectively coupling said reciprocatory driving element to a plurality of bars, said pins being arranged for movement in parallel planes, and independent means for moving the detachable bars to a non-couling position relative to said reciprocatory driving element. l

In testimony whereof, l. have signed my name to this speciiieation in the presence of two subscribing witnesses.

, HERBERT CQRRALL.

Witnessesr' i 1WALLACE Cnaiistron' Famwarrma, HENRY' Mason. 

